1st appearance of Hazmat, a woman confined to a hazmat suit who exudes radiation and other deadly substances

1st appearance of Mettle, a skinless, armored mutant

1st appearance of Striker, fame-obsessed mutant

1st appearance of Veil, a young woman with the ability to transform into a gaseous state

1st appearance of Finesse, a polymath with powers similar to Taskmaster who is suspected of being her father

[July 2022 - Marvel recently trademarked the title Avengers Academy]